Strip safe-releasing device using ratchets

ABSTRACT

A strip safe-releasing device using ratchets is disclosed. A body and handle is connected by a shaft. Since the stopping piece of the body with respect to the handle is installed with a sliding groove. Thereby, the handle can be rotated so that the stopping piece is inserted into the sliding groove, then the convex portion ejects the buckle to release the ratchet. Thereby, the shaft is driven by the reaction force of the strip so as to release the tension of the strip. Since the rotation of the ratchet will synchronously drive the convex portion of the handle not to eject the buckle. Thus, the buckle moves forwards to engage the ratchet and confine the rotation of the shaft. Therefore, each time the shaft rotate through a few angles, the tension releases a little. Therefore, the tension of the strip is released step by step in a safe way.

FIELD OF THE INVENTION

[0001] The present invention relates to a strip safe-releasing deviceusing ratchets, wherein by confining a ratchet, a shaft combining withthe ratchet is released to rotate through a predetermined angle, thenthe ratchet is stopped and thus the tension in releasing a strip isreleased step by step.

BACKGROUND OF THE INVENTION

[0002] Referring to FIG. 8, a prior art ratchet buckle is illustrated. Ashaft 81 passes through a body 82 and a handle 83. The shaft 81 isinstalled with two ratchets 84. The shaft 81 has a groove 811. A strip 9passes through the groove 811. The body 82 has a buckle 821. Thestopping piece 821 is ejected by a spring 822 to engage the two ratchets84. The handle 83 is installed with a stopping piece 831 which isslidably arranged. Thereby, as the handle 83 is rotated, the stoppingpiece 831 will engage the ratchets 84 to drive the shaft 81 to rotate.Therefore, the shaft 81 will wind the strip 9. The body 82 has a slot823 with respect to the stopping piece 831. Thereby, when the stoppingpiece 831 can be embedded into the slot 823, the stopping piece 831 willseparate from the ratchets 84 and is not engaged therewith. Meahwhile,the convex portion 23 of the handle 83 will eject the buckle 821. As aresult, the shaft 81 and the ratchets 84 may rotate freely for releasingthe strip 9.

[0003] In general, the ratchet buckle is used to tighten the strip 9 forpacking the goods on a trunk or a caravan. One end of the strip 9winding the goods passes through the groove 811 of the shaft 81. Thebody 82 is combined with a hook (not shown) for hooking to a car. Byrotating the handle repeatedly, the stopping piece 831 resists againstthe ratchets 84 and then drives the shaft 81 to rotate. The shaft 81winds the strip 9 so that the strip 9 is tightened by the shaft 81 totightly tie the goods. If it is desired to release the goods, the handle83 is rotated and the stopping piece 831 is embedded into the groove 823so as to separate from the ratchets 84. Meanwhile, the convex portion833 of the handle 83 will eject the buckle 821, as shown in the FIG. 9.As a result, the shaft 81 and the ratchets 84 may rotate freely. Thetightening strip 9 will drive the shaft 81 to rotate by the reactionforce induced from the tension of the strip 9. Consequently, the strip 9is released and loosed. Thus, the strip 9 is taken away.

[0004] However, the tension of a tightening strip 9 may be as high asseveral hundreds Kgw. Therefore, at the time that the strip 9 isreleased, it will loosen at once, and thus it is very possible that thegoods fall down.

SUMMARY OF THE INVENTION

[0005] Accordingly, the primary-object of the present invention is toprovide a strip safe-releasing device using ratchets. A body and handleis connected by a shaft. Since the stopping piece of the body withrespect to the handle is installed with a sliding groove, the handle canbe rotated so that the stopping piece is inserted into the slidinggroove, then the convex portion ejects the buckle to release theratchet. Thereby, the shaft is driven by the reaction force from thetension of the strip so as to release the tension of the strip. Sincethe rotation of the ratchet will synchronously drive the convex portionof the handle not to eject the buckle. Thus, the buckle moves forwardsto engage the ratchet and confine the rotation of the shaft. Therefore,each time the shaft rotate through a few angles, only a part of thetension is released. Therefore, the tension of the strip is releasedstep by step in a safe way.

[0006] The various objects and advantages of the present invention willbe more readily understood from the following detailed description whenread in conjunction with the appended drawing.

BRIEF DESCRIPTION OF THE DRAWINGS

[0007]FIG. 1 is a perspective view of the present invention.

[0008]FIG. 2 is a schematic view showing the process of tightening astrip in the present invention.

[0009]FIG. 3 is a schematic view showing the strip is released in thepresent invention.

[0010]FIG. 4 is another schematic view showing the strip is released inthe present invention.

[0011]FIG. 5 is a further schematic view showing the strip is releasedin the present invention.

[0012]FIG. 6 is a yet schematic view showing the strip is released inthe present invention.

[0013]FIG. 7 is a schematic view showing the ratchet is releasedcompletely in the present invention.

[0014]FIG. 8 is a perspective view showing a of a prior art ratchetbuckle.

[0015]FIG. 9 is a schematic view showing the releasing of a ratchet in aprior ratchet buckle.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Referring to FIGS. 1 to 6, the embodiment of the presentinvention is illustrated. In this the present invention, the presentinvention is formed by a shaft 3 passing through a body 1 and a handle2. Two side of the body are protrudes with respective ears 101 and twosides of the handle 2 are protruded with pivotal portions 201. The shaft3 passes through the two ear 101 and two pivotal portions 201 so thatthe body 1 is pivotally connected to the handle 2.

[0017] A ratchet 32 is formed between each of the two ears 101 and eachof the two pivotal portions 201. Each ratchet 32 has a plurality ofteeth 321. The shaft 3 has a penetrating groove 31 which axiallypenetrates through the shaft 3. A strip 4 winds around the groove 31.

[0018] Each of two sides of the body 1 has a trench 102 for beingembedded by a buckle 11. A spring 12 is formed between the buckle 11 andthe body 1. By the ejecting force of the spring 12, the buckle 11 isengaged with the ratchet 32. Each of the two sides of the handle 2 has atrench 202 for being embedded with a stopping piece 21, wherein thestopping piece 21 is slidable in the trench 202. An elastomer 22 isinstalled between the stopping piece 21 and the handle 2. By the elasticforce of the elastomer 22, the stopping piece 21 is engaged with theratchet 32.

[0019] As the two ears 101 of the body 1 is rotated with respect to thehandle 2, in the position of the stopping piece 21, a convex portion 13,a stopper 16, a sliding groove 15 and a slot 14 are sequentiallyarranged. The two pivotal portions 201 of the handle 2 each have aconvex portion 23 at position with respect to the buckle 11.

[0020] The concave portion 13 of the stopping piece 21 dose not contactthe stopping piece 21. The height of the stopping piece 21 is higherthan the teeth 321 of the ratchet 32 so that as the stopping piece 21passes through the stopper 16, it is separated from the ratchet 32. Thewidth of the sliding groove 15 is about one node of the ratchet 32. Theside of the sliding groove adjacent to the stopper 16 is a guide tiltsurface 151. Near the upper edge of the guide tilt surface 151 isinstalled with a stopping surface 152 for resisting the stopping piece21 so as to avoid that the stopping piece 21 runs away from the slidinggroove through the guide tilt surface 151. A side of the sliding groove15 adjacent to the slot 14 is a resisting surfacel53. When the ratchet32 is stopped by the buckle 11 and is engaged therewith, the guide tiltsurface 151 is corresponding to a back side 322 of the tooth 321 of theratchet 32. The height of the guide tilt surface 151 is higher than theratchet 32. Thereby, when the stopping piece 21 slides on the guide tiltsurface 151, it will be lifted and then separates from the ratchet 32.When the stopping piece 21 resists against the resisting surfacel53, theconvex portion 23 is at a position in which it can eject the stoppingpiece 21 so that the stopping piece separates from the ratchet 32. Whenthe stopping piece 21 is embedded in the slot 14, it separates from theratchet 32, and then the convex portion 23 is at position at which itwill eject the buckle 11 so that the stopping piece separates from theratchet 32.

[0021] Referring to FIG. 2, in using, the handle 2 is rotated so thatthe stopping piece 21 is at the convex portion 13 to be engaged to theratchet 32. Then, by rotating the handle 2, the stopping piece 21 willdrive the ratchet 32 to rotate and then the buckle 11 is ejected. Thenshaft 3 winds the strip 4 winding around the strip groove 31. If thehandle 2 is rotated repeatedly, the shaft 3 will drive the strip 4 totightly engage the strip. Thereby, the strip 4 can tightly wind goods.

[0022] When goods are desired to be detached, the handle 2 is rotated,so that the stopping piece 21 is inserted into the sliding groove 15, asshown in the FIG. 3. Then, the ratchet 32 is motionlessly buckled in thebuckle 11. The stopping piece 21 resists against the backside 322 of thetooth 321 of the stopping piece 21, so that the handle 2 may be rotatedfreely. If the handle 2 is rotated clockwise as illustrated in thedrawing, then the stopping piece 21 will resist against the resistingsurface 153 of the sliding groove 15. Then, the convex portion 23 of thehandle 2 ejects the buckle 11 as shown in the FIG. 4. Thereby, theratchet 32 may be rotated freely and the shaft 3 may rotate along areverse direction by the pulling force of the reaction force of thestrip 4. Then, the tooth 321 passes through the buckle 11, as shown inthe FIG. 5. As the shaft 3 rotates, the handle 2 is driven to rotatebackwards, then the strip 4 is released with the rotation of the shaft 3for avoiding a large part of the strip 4 to be released. After thehandle 2 rotates backwards, the convex portion 23 will not eject thebuckle 11 further. Thus, the buckle 11 moves forwards to be engaged withthe ratchet 32. Thus, the ratchet 32 is again buckled by the buckle 11and can not rotate reversely. At the same time, the ratchet 32 willresist against the stopping piece 21 to raise along the guide tiltsurface 151 until the ratchet 32 ejects the tooth 321 to pass throughthe stopping piece 21, as shown in the FIG. 6. Therefore, the stoppingpiece 21 moves to the backside 322 of another tooth 321 so as to returnto the condition illustrated in FIG. 3. Each time, the traveling lengthis equal to one tooth of the ratchet 32 as the shaft 3 rotates theratchet 32. Namely, each time a tooth passes through the buckle 11, thepressure of the strip 4 can be released step by step so that the tensionof the strip 4 is released gradually instead of releasing all thetension at one time. When the pressure of the strip 4 is released to apredetermined level, the user may rotate the handle 2 to be embeddedinto the slot 14, as shown in the FIG. 7. Therefore, the stopping piece21 is released from the ratchet 32. Then the convex portion 23 of thehandle 2 ejects the buckle 11, and the shaft 3 and the ratchet 32 may berotated freely. Thus, the user can pull the strip 4 out as desired fordetaching goods.

[0023] In summary, since the stopping piece 21 of the body 1 withrespect to the handle 2 is installed with a sliding groove 15. Thereby,the handle 2 can be rotated so that the stopping piece 21 is insertedinto the sliding groove 15, then the convex portion 23 ejects the buckle11 to release the ratchet 32. Thereby, the shaft 3 is driven by thereaction force from the tension of the strip 4 so as to release thetension of the strip 4. Since the rotation of the ratchet 32 willsynchronously drive the convex portion 23 of the handle 2 not to ejectthe buckle 11. Thus, the buckle 11 moves forwards to engage the ratchet32 and confine the rotation of the shaft 3. Therefore, each time theshaft 3 rotates through an angle, only a small part of the tension isreleased. Therefore, the tension of the strip 4 is released step by stepin a safe way.

[0024] Although the present invention has been described with referenceto the preferred embodiments, it will be understood that the inventionis not limited to the details described thereof. Various substitutionsand modifications have been suggested in the foregoing description, andothers will occur to those of ordinary skill in the art. Therefore, allsuch substitutions and modifications are intended to be embraced withinthe scope of the invention as defined in the appended claims.

What is claimed is:
 1. A strip safe-releasing device using ratchets,wherein the device is formed by a shaft passing through a body and ahandle; two sides of the body is protruded with respective ears and twosides of the handle are protruded with pivotal portions; the shaftpasses through the two ears and two pivotal portions so that the body ispivotally connected to the handle; a ratchet is formed between each ofthe two ears and each of the two pivotal portions; each ratchet has aplurality of teeth; the shaft has a penetrating groove which axiallypenetrates through the shaft; a strip winds around the groove; each oftwo sides of the body has a trench for being embedded with a buckle; aspring is formed between the buckle and the body; by the ejecting forceof the spring; the buckle is engaged with the ratchet; each of the twosides of the handle has a trench for being embedded with a stoppingpiece, wherein the stopping piece is slidable in the trench; anelastomer is installed between the stopping piece and the handle; by theelastic force of the elastomer, the stopping piece is engaged with theratchet; from the rotating direction of the two ears of the body withrespect to the handle, in the stopping piece, a convex portion, astopper, a sliding groove and a slot are sequentially arranged; twopivotal portions of the handle each have a convex portion at positionwith respect to the buckle; the concave portion of the stopping piecedose not contact the stopping piece; a height of the stopping piece ishigher than the teeth of the ratchet so that as the stopping piecepasses through the stopper, it is separated from the ratchet; a width ofthe sliding groove is about one node of the ratchet; a side of thesliding groove adjacent to the stopper is a guide tilt surface; a sideof the sliding groove adjacent to the slot is a resisting surface; whenthe ratchet is stopped by the buckle and is engaged therewith, the guidetilt surface is corresponding to a back side of a tooth of the ratchet;a height of the guide tilt surface is higher than the ratchet; thereby,when the stopping piece slides on the guide tilt surface, it will belifted and then separates from the ratchet; when the stopping pieceresists against the resisting surface, the convex portion is at aposition in which it ejects the stopping piece so that the stoppingpiece separates from the ratchet; when the stopping piece is embedded inthe slot, it separates from the ratchet, and then the convex portion isat position at which it will eject the buckle so that the stopping pieceseparates from the ratchet.
 2. The strip safe-releasing device usingratchets as claim in claim 1, wherein near an upper edge of the guidetilt surface is installed with a stopping surface for resisting thestopping piece so as to avoid that the stopping piece runs away from thesliding groove through the guide tilt surface.